libmymath.a:my_add.o my_sub.o
		ar -rc $@ $^
my_add.o:my_add.c
		gcc -c my_add.c -o my_add.o
my_sub.o:my_sub.c
		gcc -c my_sub.c -o my_sub.o
.PHONY:
output:
		mkdir -p mylib/include
		mkdir -p mylib/lib
		cp -f *.a mylib/lib 
		cp -f *.h mylib/include
.PHONY:
clean:
		rm -rf *.o libmymath.a mylib
